Solar collector



FIG. 1 is a front perspective view of a solar collector, showing my new design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof. 

The ornamental design for solar collector, substantially as shown and described. 